The CPS guidelines on knife crime

http://www.cps.gov.uk/legal/section12/chapter_c.html#07

state that

"a butterknife, with no cutting edge and no point is a bladed article;
(Booker v DPP 169J.P. 368, DC);"

I've drawn a blank attempting to find any more information on this
decision. I had, wrongly, assumed that for anything to be classed as a
bladed weapon it had to have a cutting edge.

Anyone care to shed light on this case? Should I remove the plastic
picnic cutlery from my glove box?

It's also worth noting that the CPS quote from Deegan is not what the
court said, but it appears to be what the court meant to say.

Anyone care to shed light on this case? Should I remove the plastic
picnic cutlery from my glove box?

If you believe a court may not accept your claim of having a good reason to
keep the cutlery there then yes.

I was under the impression (from the PNLD) that you had to have a
specific reason, not "I thought it might come in handy".

One might think that the "good reason" would need to be better for a 2
foot machete than a plastic butter knife, but I suspect that the case
the CPS refer to decided not, hence the question.